<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
// 原教程导入echarts报错：[Vue warn]: Error in mounted hook: "TypeError: Cannot read property 'init' of undefined"
// import echarts from 'echarts'

// bilibili弹幕教学 方式1：1、import * as echarts from 'echarts'导入echarts
import * as echarts from 'echarts'

import _ from 'lodash'

export default {
  name: 'Report',
  data: function () {
    return {
      // 需要合并的数据
      options: {
        title: {
          text: 'ECharts 入门示例'
        },
        tooltip: {},
        legend: {
          data: ['销量']
        },
        xAxis: {
          data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
        },
        yAxis: {},
        series: [{
          name: '销量',
          type: 'bar',
          data: [5, 20, 36, 10, 10, 20]
        }]
      }
    }
  },
  created () {
  },
  // dom上的元素被渲染完成了
  async mounted () {
    // bilibili弹幕教学 方式2：1、const echarts = require('echarts')导入echarts
    // const echarts = require('echarts')

    // 3.基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'))

    const { data: res } = await this.$http.get('reports/type/1')

    if (res.meta.status !== 200) {
      return this.$message.error('获取折线图数据失败！')
    }

    // 4.指定图表的配置项和数据
    // eslint-disable-next-line no-undef
    const result = _.merge(res.data, this.options)
    console.log('merge', result)
    // 5.展示数据
    myChart.setOption(result)
  },
  methods: {

  }
}
</script>

<style lang="less" scoped>

</style>
